EP4203533A1 - Procédé, dispositif et système de génération de clé d'ancrage - Google Patents

Procédé, dispositif et système de génération de clé d'ancrage Download PDF

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Publication number
EP4203533A1
EP4203533A1 EP22210348.3A EP22210348A EP4203533A1 EP 4203533 A1 EP4203533 A1 EP 4203533A1 EP 22210348 A EP22210348 A EP 22210348A EP 4203533 A1 EP4203533 A1 EP 4203533A1
Authority
EP
European Patent Office
Prior art keywords
key
anchor
amf
identifier
access
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP22210348.3A
Other languages
German (de)
English (en)
Other versions
EP4203533B1 (fr
EP4203533C0 (fr
Inventor
Rong Wu
Bo Zhang
Lu Gan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP25178763.6A priority Critical patent/EP4651533A1/fr
Publication of EP4203533A1 publication Critical patent/EP4203533A1/fr
Application granted granted Critical
Publication of EP4203533B1 publication Critical patent/EP4203533B1/fr
Publication of EP4203533C0 publication Critical patent/EP4203533C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/0869—Network architectures or network communication protocols for network security for authentication of entities for achieving mutual authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
    • H04W12/041—Key generation or derivation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
    • H04W12/043—Key management, e.g. using generic bootstrapping architecture [GBA] using a trusted network node as an anchor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
    • H04W12/043—Key management, e.g. using generic bootstrapping architecture [GBA] using a trusted network node as an anchor
    • H04W12/0431—Key distribution or pre-distribution; Key agreement
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
    • H04W12/043—Key management, e.g. using generic bootstrapping architecture [GBA] using a trusted network node as an anchor
    • H04W12/0433—Key management protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/08—Access security
    • H04W12/088—Access security using filters or firewalls
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/25—Maintenance of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H04W80/10—Upper layer protocols adapted for application session management, e.g. SIP [Session Initiation Protocol]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/022—Selective call receivers
    • H04W88/023—Selective call receivers with message or information receiving capability

Definitions

  • step 509 to step 511 may be replaced with the following steps 5112 to 5116.
  • K left trunc (EMSK or MSK).
  • This formula means that some bits of the EMSK or the MSK are directly truncated as K left , and trunc is used to truncate a value.
  • trunc(number) indicates truncating a number
  • trunc(date) indicates truncating a date.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
EP22210348.3A 2017-05-05 2018-04-25 Procédé, dispositif et système de génération de clé d'ancrage Active EP4203533B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP25178763.6A EP4651533A1 (fr) 2017-05-05 2018-04-25 Procédé, dispositif et système de génération de clé d'ancrage

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201710313519 2017-05-05
CN201710908017.0A CN108809635B (zh) 2017-05-05 2017-09-29 锚密钥生成方法、设备以及系统
EP18795025.8A EP3531732B1 (fr) 2017-05-05 2018-04-25 Procédé de génération de clé d'ancrage, dispositif et système
PCT/CN2018/084416 WO2018201946A1 (fr) 2017-05-05 2018-04-25 Procédé de génération de clé d'ancrage, dispositif et système

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP18795025.8A Division EP3531732B1 (fr) 2017-05-05 2018-04-25 Procédé de génération de clé d'ancrage, dispositif et système
EP18795025.8A Division-Into EP3531732B1 (fr) 2017-05-05 2018-04-25 Procédé de génération de clé d'ancrage, dispositif et système

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP25178763.6A Division-Into EP4651533A1 (fr) 2017-05-05 2018-04-25 Procédé, dispositif et système de génération de clé d'ancrage
EP25178763.6A Division EP4651533A1 (fr) 2017-05-05 2018-04-25 Procédé, dispositif et système de génération de clé d'ancrage

Publications (3)

Publication Number Publication Date
EP4203533A1 true EP4203533A1 (fr) 2023-06-28
EP4203533B1 EP4203533B1 (fr) 2025-07-23
EP4203533C0 EP4203533C0 (fr) 2025-07-23

Family

ID=64094528

Family Applications (3)

Application Number Title Priority Date Filing Date
EP25178763.6A Pending EP4651533A1 (fr) 2017-05-05 2018-04-25 Procédé, dispositif et système de génération de clé d'ancrage
EP22210348.3A Active EP4203533B1 (fr) 2017-05-05 2018-04-25 Procédé, dispositif et système de génération de clé d'ancrage
EP18795025.8A Active EP3531732B1 (fr) 2017-05-05 2018-04-25 Procédé de génération de clé d'ancrage, dispositif et système

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP25178763.6A Pending EP4651533A1 (fr) 2017-05-05 2018-04-25 Procédé, dispositif et système de génération de clé d'ancrage

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP18795025.8A Active EP3531732B1 (fr) 2017-05-05 2018-04-25 Procédé de génération de clé d'ancrage, dispositif et système

Country Status (8)

Country Link
US (3) US11012855B2 (fr)
EP (3) EP4651533A1 (fr)
JP (1) JP6924848B2 (fr)
KR (1) KR102245688B1 (fr)
CN (5) CN109874139B (fr)
BR (1) BR112019022792B1 (fr)
ES (1) ES3041032T3 (fr)
WO (1) WO2018201946A1 (fr)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11849319B2 (en) * 2017-07-28 2023-12-19 Telefonaktiebolaget Lm Ericsson (Publ) Methods providing non-3GPP access using access network keys and related wireless terminals and network nodes
WO2020090886A1 (fr) * 2018-11-02 2020-05-07 Nec Corporation Procédé, ue et réseau pour fournir une négociation de kdf
CN111404666B (zh) 2019-01-02 2024-07-05 中国移动通信有限公司研究院 一种密钥生成方法、终端设备及网络设备
EP3684088A1 (fr) * 2019-01-18 2020-07-22 Thales Dis France SA Procédé d'authentification d'un élément sécurisé coopérant avec un équipement mobile à l'intérieur d'un terminal dans un réseau de télécommunication
WO2020208294A1 (fr) * 2019-04-11 2020-10-15 Nokia Technologies Oy Établissement de voies de communication sécurisées vers un serveur de connexion à voies multiples (mpc) à connexion initiale sur un réseau public
US12069471B2 (en) * 2019-06-17 2024-08-20 Telefonaktiebolaget Lm Ericsson (Publ) Handling of NAS container in registration request at AMF re-allocation
CN110830985B (zh) * 2019-11-11 2022-04-29 重庆邮电大学 一种基于信任机制的5g轻量级终端接入认证方法
US12177666B2 (en) * 2019-12-11 2024-12-24 Telefonaktiebolaget Lm Ericsson (Publ) Enhancement of authentication
KR102797871B1 (ko) 2020-01-16 2025-04-17 지티이 코포레이션 서비스 애플리케이션들과의 암호화된 통신을 위한 통신 네트워크에서의 앵커 키 생성 및 관리를 위한 방법, 디바이스, 및 시스템
WO2021093164A1 (fr) * 2020-01-16 2021-05-20 Zte Corporation Procédé, dispositif et système de mise à jour de clé d'ancrage dans un réseau de communication à des fins de communication chiffrée avec des applications de service
EP4091310B1 (fr) 2020-01-16 2026-01-14 ZTE Corporation Procédé, dispositif et système de génération et de gestion de clé d'application dans un réseau de communication pour une communication cryptée avec des applications de service
CN113162758B (zh) * 2020-01-23 2023-09-19 中国移动通信有限公司研究院 一种密钥生成方法及设备
MX2022010227A (es) * 2020-02-21 2022-09-19 Ericsson Telefon Ab L M Seleccion de funcion de servidor de autenticacion en autenticacion y administracion de claves.
CN115915132A (zh) * 2020-04-30 2023-04-04 华为技术有限公司 密钥管理方法、设备及系统
CN113873492B (zh) * 2020-06-15 2022-12-30 华为技术有限公司 一种通信方法以及相关装置
CN120730300A (zh) 2020-09-30 2025-09-30 华为技术有限公司 一种密钥推衍方法及其装置、系统
CN120935569A (zh) * 2020-12-25 2025-11-11 华为技术有限公司 一种安全上下文生成方法、装置及计算机可读存储介质
CN112738799A (zh) * 2020-12-29 2021-04-30 中盈优创资讯科技有限公司 一种基于策略的数据安全传输的实现方法
CN116783917A (zh) * 2021-01-30 2023-09-19 华为技术有限公司 一种安全参数的获取方法、装置及系统
KR20220144670A (ko) * 2021-04-20 2022-10-27 삼성전자주식회사 이동 통신 시스템에서 단말 간 연결을 통한 네트워크 접속 요청의 인증을 위한 방법 및 장치
CN117014136A (zh) * 2022-04-29 2023-11-07 中国移动通信有限公司研究院 一种信息传输方法及设备
US12556912B2 (en) * 2023-06-28 2026-02-17 Verizon Patent And Licensing Inc. Systems and methods for provisioning security policies for deriving session keys

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7908484B2 (en) * 2003-08-22 2011-03-15 Nokia Corporation Method of protecting digest authentication and key agreement (AKA) against man-in-the-middle (MITM) attack
CN101523765B (zh) * 2006-09-28 2013-06-12 三星电子株式会社 异构无线网络中提供用户设备发起和协助反向切换的系统及方法
JP4390842B1 (ja) * 2008-08-15 2009-12-24 株式会社エヌ・ティ・ティ・ドコモ 移動通信方法、無線基地局及び移動局
CN101771990B (zh) * 2008-12-31 2013-03-20 华为技术有限公司 一种密钥获取方法、设备和系统
CN101540981B (zh) * 2009-04-30 2014-03-12 中兴通讯股份有限公司 一种在紧急呼叫中进行安全能力协商的方法及系统
CN101742498A (zh) * 2009-12-18 2010-06-16 中兴通讯股份有限公司 空口密钥的管理方法和系统
US20110312299A1 (en) * 2010-06-18 2011-12-22 Qualcomm Incorporated Methods and apparatuses facilitating synchronization of security configurations
US20120108206A1 (en) 2010-10-28 2012-05-03 Haggerty David T Methods and apparatus for access control client assisted roaming
CN102572819B (zh) 2010-12-22 2015-05-13 华为技术有限公司 一种密钥生成方法、装置及系统
CN102625300B (zh) * 2011-01-28 2015-07-08 华为技术有限公司 密钥生成方法和设备
CN103781069B (zh) * 2012-10-19 2017-02-22 华为技术有限公司 一种双向认证的方法、设备及系统
CN103856288B (zh) 2012-12-04 2017-06-06 北汽福田汽车股份有限公司 用于汽车的can通讯信号校验与传输方法和系统
CN103607713A (zh) * 2013-10-29 2014-02-26 小米科技有限责任公司 网络接入方法、装置、设备和系统
EP3095266B1 (fr) * 2014-01-14 2020-06-24 Telefonaktiebolaget LM Ericsson (publ) Contrôle d'accès pour un réseau sans fil
JP6123035B1 (ja) * 2014-05-05 2017-04-26 テレフオンアクチーボラゲット エルエム エリクソン（パブル） Ｔｗａｇとｕｅとの間でのｗｌｃｐメッセージ交換の保護
US9706397B2 (en) 2015-06-05 2017-07-11 Qualcomm Incorporated Flexible configuration and authentication of wireless devices
KR102304147B1 (ko) * 2015-06-05 2021-09-23 콘비다 와이어리스, 엘엘씨 통합된 스몰 셀 및 wi-fi 네트워크를 위한 통합 인증
US9674704B1 (en) * 2015-11-23 2017-06-06 Motorola Mobility Llc Network connectivity switching utilizing an authentication device
CN105554747B (zh) * 2016-01-29 2018-09-04 腾讯科技（深圳）有限公司 无线网络连接方法、装置及系统
US10433163B2 (en) * 2016-09-19 2019-10-01 Qualcomm Incorporated Techniques for deriving security keys for a cellular network based on performance of an extensible authentication protocol (EAP) procedure
CN106790053B (zh) 2016-12-20 2019-08-27 江苏大学 一种can总线中ecu安全通信的方法

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
"3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; 3GPP System Architecture Evolution (SAE); Security architecture (Release 13)", 3GPP STANDARD; 3GPP TS 33.401, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. SA WG3, no. V13.0.0, 24 September 2015 (2015-09-24), pages 1 - 131, XP050996290 *
CHINA MOBILE: "[MTCe] Key derivation clarification about group authentication mechanism", vol. SA WG3, no. Nanjing, China; 20150420 - 20150424, 19 April 2015 (2015-04-19), XP050943537, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/SA3/Docs/> [retrieved on 20150419] *
NOKIA: "Proposed interim agreement on anchor key for 5G phase 1", vol. SA WG3, no. Busan, Korea; 20170327 - 20170331, 4 April 2017 (2017-04-04), XP051258591, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_sa/WG3_Security/TSGS3_86b_Busan/Docs/> [retrieved on 20170404] *
VODAFONE: "pCR to TR 33.863: Multiple changes as per conference call", vol. SA WG3, no. Anaheim (USA); 20151109 - 20151113, 14 November 2015 (2015-11-14), XP051036441, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_sa/WG3_Security/TSGS3_81_Anaheim/Docs/> [retrieved on 20151114] *

Also Published As

Publication number Publication date
EP4203533B1 (fr) 2025-07-23
CN109874139B (zh) 2020-02-07
CN108809635A (zh) 2018-11-13
US10966083B2 (en) 2021-03-30
US20190297494A1 (en) 2019-09-26
BR112019022792B1 (pt) 2021-08-17
CN109874139A (zh) 2019-06-11
US20190253889A1 (en) 2019-08-15
EP3531732B1 (fr) 2023-01-11
EP3531732A1 (fr) 2019-08-28
CN110612729B (zh) 2021-12-17
US20220295271A9 (en) 2022-09-15
RU2019139240A3 (fr) 2021-09-07
KR20200003108A (ko) 2020-01-08
WO2018201946A1 (fr) 2018-11-08
CN118890146A (zh) 2024-11-01
CN110612729A (zh) 2019-12-24
EP4203533C0 (fr) 2025-07-23
CN108809635B (zh) 2024-07-09
EP3531732A4 (fr) 2019-10-30
US11012855B2 (en) 2021-05-18
ES3041032T3 (en) 2025-11-06
JP2020519157A (ja) 2020-06-25
EP4651533A1 (fr) 2025-11-19
JP6924848B2 (ja) 2021-08-25
CN108810890A (zh) 2018-11-13
BR112019022792A2 (pt) 2020-05-19
RU2019139240A (ru) 2021-06-07
CN108810890B (zh) 2019-06-11
KR102245688B1 (ko) 2021-04-27
US20210258780A1 (en) 2021-08-19
US11924629B2 (en) 2024-03-05

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